This package includes HttpClient for sending requests over HTTP, as well as HttpRequestMessage and HttpResponseMessage for processing HTTP messages.
This package is not supported in Visual Studio 2010, and is only required for projects targeting .NET Framework 4.5, Windows 8, or Windows Phone 8.1...
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Provides a set of services to be discovered by Swagger (http://swagger.io).
Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services.

InstaSharp is a wrapper around the Instagram API. It's goal is to provide you with a clean and neat interface for ineracting with Instagram's data services, while taking care of all the lower level things like HTTP requests, OAuth flow, and mapping the JSON request to .NET classes.

Tweetinvi is an intuitive .NET C# library to access the Twitter REST API. It is a .NET Core library that can be used for development on Windows, Windows RT, Windows Phone, Xamarin Android and Xamarin iOS. Tweetinvi is also compatible with Windows 10 Universal Apps.

Provides a set of services to be discovered by Swagger (http://swagger.wordnik.com/)
Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services.